Add unit test for QgsMapToPixel (legacy only for now)

tests/src/core/CMakeLists.txt

@@ -138,6 +138,7 @@ ADD_QGIS_TEST(shapebursttest testqgsshapeburst.cpp )
 ADD_QGIS_TEST(invertedpolygontest testqgsinvertedpolygonrenderer.cpp )
 ADD_QGIS_TEST(colorschemeregistry testqgscolorschemeregistry.cpp)
 ADD_QGIS_TEST(colorscheme testqgscolorscheme.cpp)
+ADD_QGIS_TEST(maptopixeltest testqgsmaptopixel.cpp)
 ADD_QGIS_TEST(networkcontentfetcher testqgsnetworkcontentfetcher.cpp )
 ADD_QGIS_TEST(legendrenderertest testqgslegendrenderer.cpp )
 ADD_QGIS_TEST(vectorlayerjoinbuffer testqgsvectorlayerjoinbuffer.cpp )

tests/src/core/testqgsmaptopixel.cpp

@@ -0,0 +1,67 @@
+/***************************************************************************
+     testqgsmaptopixel.cpp
+     --------------------------------------
+    Date                 : Tue  9 Dec 2014
+    Copyright            : (C) 2014 by Sandro Santilli
+    Email                : strk@keybit.net
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+#include <QtTest/QtTest>
+#include <QObject>
+#include <QString>
+#include <QObject>
+//header for class being tested
+#include <qgsrectangle.h>
+#include <qgsmaptopixel.h>
+#include <qgspoint.h>
+#include "qgslogger.h"
+
+class TestQgsMapToPixel: public QObject
+{
+    Q_OBJECT
+  private slots:
+    void legacy();
+};
+
+void TestQgsMapToPixel::legacy()
+{
+  QgsMapToPixel m2p(2,10,-4,3);
+
+  QgsPoint p(0,0); // in geographical units
+  QgsPoint d = m2p.transform(p); // to device pixels
+  QCOMPARE( d.x(), -1.5 );
+  QCOMPARE( d.y(), 8.0 );
+
+  QgsPoint b = m2p.toMapCoordinatesF( d.x(), d.y() ); // transform back
+  QCOMPARE( p, b );
+
+  m2p.transform(&p); // in place transform
+  QCOMPARE( p, d );
+
+  m2p.setParameters(0.2, -10, 7, 20);
+  p = m2p.toMapCoordinates( -1, -1 );
+  QCOMPARE( p.x(), -10.2 );
+  QCOMPARE( p.y(), 11.2 );
+  d = m2p.transform(p);
+  QCOMPARE( d, QgsPoint(-1, -1) );
+
+  p = m2p.toMapCoordinates( 20, 20 );
+  QCOMPARE( p.x(), -6.0 );
+  QCOMPARE( p.y(), 7.0 );
+  d = m2p.transform(p);
+  QCOMPARE( d, QgsPoint(20, 20) );
+
+};
+
+QTEST_MAIN( TestQgsMapToPixel )
+#include "testqgsmaptopixel.moc"
+
+
+
+